I need to invest around 4 crores in the NCR region for short term a year or 18 months max,but am confused between golf cource ext,sohna road or vasant kunj in delhi.I am not planning to reside in them but my prior concern is that i dont want to hold them for a longer period and need an easy exit.would be grateful if someone with good insight could let me know his opnion.

Based on your budget & time horizon i can suggest a couple of things -
a) Either invest in a builder flat with good developer in South Delhi. In 18months you will definitely get 10-20% appreciation irrespective of market conditions. In South delhi (or most parts of Delhi for that matter) prices never go down.
b) Another good option in Gurgaon can be to invest in some plot in SL-1, DLF or South City-1. Next Few years, these areas will give good returns for sure. However, in next 18 months if market conditions remain sluggish, it might take some time to get your money liquid in GRGN. Definitely in Delhi liquidating is lot easier.

From last 3 years Dwarka resale activity was non existent because most of under construction socities were under litigation. But high court has cleared the case now and posession for most socities will start in the next 2-3 months.

Current prices are in the range of 6,000 to 10,000 psf. Expect 15-20% return in 18-24 months. If this is not a good RoI for you - then FD is obvious choice and is safe bet too.

If you have a longer horizon i.e 3-5 yrs, then Dwarka will be a good choice because of all the developments that has been announced by DDA including Delhi's 2nd diplomatic enclave and golf course.